Signaling system.



H. 'O. RUGH. SIGNALING SYSTEM. APPLIUATION FILED novy25, 1910.

Patented Jan.21,191 3.

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SIGNALING srsrnra.

Let r Pa n Patented Jan. 21, 1913-.

Application filed November 25, 1910. Serial No. 594,157.

To all whom it may concern Be it known that I, HARRY 0. Even, a citizen of the United States, residing at Sandwich, in the county of Dekalb and State of Illinois,have invented a certain new and use ul Improvement in' Signaling Systems, of hich the following is a full, clear, concise, and exact description, reference be: ing had to the accompanying drawings, forming a part of this specification.

, My invention relates to signaling systems and more particularly to that character of signaling systems in which a plurality of stations are associated with the same line circuit, and in which each station in addition to having signal receiving means is provided with signal sending appliances to scall any of the other stations selectively. In such a system under consideration, means are provided-at a central location which can be actuated from the substations in such a manner as to project the proper signaling currents onto the line to call any desired 'on. These means may be operated from r station. In the embodiment shown, it. is immaterial Whether these signal sending means are located at a central station or at other station, but I will refer in this description to these devices as being placed at a central station, although as stated they may be arranged anywhere along the circuit. I will also designate the stations which have the signal receiving devices and the means for causing the operation of the signal sendingdevices as substations although one may be a so-c alled central station and theothers the substations.-

My improvements relate to a system of the character described: and their object is to arrange these central signal sending devices in such a way that the actuating means at each substation may be connected to either Qnezof the line wires and secure the same result. The advantage of this will be apparcut when it is remembered that signaling circuits or other similar circuits are frequently transposed or enter an oflice through a cable, and it is therefore frequently difiicult to distinguish between the two conductors of a circuit, and it represents a great saving of time during the installation and clearing of trouble if such a distinction need not be made.

I will describe my invention more in detail by reference to the accompanying drawing, which I set forth a system of the character described having novel substation signal receiving apparatus and also having my improved central station or signal current controlling means.

The improved system irrespective of my, central stationapparatus is made the sub ject matter of a separate application Serial No. 594,159, filed Nov. 25, 1910, but as suitable substation apparatus must be described in connection with my central station apparatus, I will describe not only the improvements claimed herein but the entire system.

In the drawing I show two line wires 1 and 2 as uniting a central station A and substations B, C and D. At each of the substations I employ a step-by-step element 3 normally resting against a stop 1, to which stop it is impelledby the spring'5. The ele ment 3 carries a pointer 6 which when in electrical association with the contact spring 7 closes circuit through a signal 8 and bat tery 9 to operate said signal. The element 3 is provided with teeth 10 and maybe stepped up to any desired angular position, dificrent angular positions corresponding to different stations. The element 3 is designed to be moved step-by-stcp and when, for instance, the arm 6 passes a spring 7 in its movement to a station having a greater number of im. pulses, such momentary contact between the elements 6 and 7 is of such short duration as not to operatively actuate the preferably slow acting bell 8.

A locking pawl 11 controlled by a sloW acting magnet 12 is brought into engagement with the teeth of the element 3 when the first impulse is sent over the line wires, which preferably is a long impulse and thereafter the succeeding impulses which are of short duration and sufiicient in number to call the pro-determined station have such a short time interval between them that the slow acting magnet 12 does not release its armature 13 until the sending of impulses ceases entirely. This slow acting feature of the magnet 12 is brought about by a copper or other metallic shell 14 acting in the nature of a short circuited secondary winding. The

locking pawl 11 by means of the insulation 15 controls the step-up pawl 16 which is actuated by the magnet 17 When the lock.- ing pawl 11 is out of engagementwith the element 'fit also removes the pawl 16 and.

allows the spring 5- to restore the element 3 a 0 its position against the a. "When, ewever the first impulse begins", the pawl i1 enters engagement with the teeth or. the element 3, the pawl'lG also enters said teeth and is in condition to angularly move said element 3 in accordance with impulses received through the magnet 17.

It will be seen that but one character of current is necessary, namely impulses of one polarity not only to step-up the element but also to release it. By. reason ofthis 1 am enabled to provide central station appliances of a suitable character which need have but one signal sending circuit closing element under the control of the substations.- in order to provic e these impulses, the central station apparatus set forth at station A is associated with the line circuit and thiscentral station apparatus isoperated to send a predetermined number of impulses by keys 18 provided at each substation which serve to ground a line conductor preferably through the interposition of suitable resistance or impedance 19.

In accordance with the central station apparatus it is immaterial Whether line conductor 1 or line conductor 2 is grounded.

The system thus 'far described is the system of my said co-pending application and I have described it herein as being as simple a form as I know of at the present time for use in connection with my signal sending station apparatus, which signal sending star tion apparatus is so arranged that the operating keys 18 at the substations which are used to call any other station may be connected to either line wire 1 and 2. It is the objectof my invention to so arrange the signal sending apparatus that such a connection of the keys 18 is possible. This improved signal sending apparatus comprises an electromagnet 20 having two coils 21 and 22 and an armature 23 associated with two contact points 24 and 25. One terminal of each of the magnets 21 and 22 is connected with the positive pole of a battery 26 whose-negative pole is connected through a relay 27 to earth. Now, when the keys 18 are depressed, for instance, the key 18 of substation B, magnet 22 is actuated to close circuit between the armature 23 and the contact point 24:. When the key 18 of station G is operated, magnet 21 is actuated to close circuit through the armature 23 and the contact point 25. The armature 23 remains in either one position or the other until the key 18 of the other line wire is actuated. At the same time that either of the magnets 21 and 22 is actuated, relay 2? is actuated to close circuit through a battery 28 and either one or the other of two relays 29 or 30. If the armature 28 engages the contact point 24, then magnet 29 is actuated and if the actuation is brought about over the line wire 1 the armature 23 engagesconl and relay 86 is energized. ind 30 have armatures the armatu react points e with the neg" attery Que terminal the magnet 21 connects to the contact point and one terminal of the magnet 22 35 12" nects to the contact point 35.

The armature 23 then occupies the posit n against the contact point 24. Energize. of the relay 27 closes circuit through magnet 29 and battery 28 on; account of the armature 23 and contact 24, thereby attractingv armw ture 30 and connecting line wire 1 with the negative terminal of the battery ifie positive terminal of said battery 26 in the meantime is connected to the line wire 2 through the magnet 22. Thus an impulse is sent over the line Wires when hey 18 of station B is depressed. When key 18 of station C is depressed, magnet- 21 is energized and the armature 23 reversed so that the relay is actuated in accordance with the actuations of the lever 18. It thus makes no difference which line Wire is used for the. substation signal sending purposes.

While I have herein shown and particu larly described the preferred embodiment of my invention, I do not mean to thereby limit myself to the precise construction and arrangement as herein set forth. but

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is; i

1. A system of the character described having aplurality of stations united by'a metallic line circuit, selective signal receiv- 119 ing devices at each station associated with said circuit, signal sending devices also associated with said circuit, and means at each station for controlling said sending devices, said sending devices including means to render said sending devices controllable over either line wire of said circuit.

2. A system of the character described having a plurality of stations united by a metallic line circuit, selective signal receiving devices at each station associated with said circuit, a signal sending device also associated with said circuit and controllable over either line wire of said circuit, and means at each station for controlling said sending device.

3. A system of the character descrihed having a plurality of stations united by a metallic line circuit, stepby-step signal receiving devices at each station associate with said circuit, signal sending devices also associated with said circuit, and means at each station for controlling said sending devices, said sending devices including means to render said sending devices controllable over either line wire of said circuit.

4. A system of the character described having a plurality of stations united by a metallic line circuit, step-by-step signal re ceiving devices at each station associated with said circuit, a signal sending device also associated with said circuit, and con trollable over either line wire of said circuit, and means at each station for controlling said sending device.

5. A system of the character described having a plurality of stations united by a metallic line circuit, selective signal receiving devices at each station associated With said circuit, signal sending devices also associated with said circuit, means at each station for controlling said sending devices, said sending devices including means to render said. sending devices controllable over either line wire of said circuit, said last aforesaid means including a relay controlled over both line wires.

6. A system of the character described having a plurality of stations united by a metallic line circuit, stcp-by-step signal receiving devices at each station associated with said circuit, signal sending devices also associated with said circuit, means at each station for controlling said sending devices, said sending devices including means to render said sending devices controllable over either line wire of said circuit, said last aforesaid means including a relay controlled over both line wires.

7. A system of the character described having a plurality of stations united by a metallic line circuit, selective signal'receiving devices ateach station associated with said circuit signalsending devices also associated with said circuit, means at each station for operatin said sending devices, said sending devices including means to render said sending devices controllable over either line wire of said circuit, said last. aforesaid means including a relay controlled over both line wires and a supplemental relay. i g

8. A system of. the character described having a plurality of stations united by a metallic line circ'iit, step-by-step signal receiving devices at each station associated with said circuit, signal sending devices also associated with said circuit, means atv each station for controlling said sending devices, said sending devices including means to render said sending devices controllable over either line wire of said circuit, said last aforesaid means including a relay controlled over both line Wires and a supplemental relay.

9. A system of the character described having a plurality of stations united by a line circuit, selective signal receiving devices at each station associated with said circuit, signal sending relays also associated with said circuit, means at each station for controlling the signal .sending operation, and means to render effective the control of said first aforesaid means whether said first named means is connected with one line wire of said circuit or the other.

10. A, system of the character described having aplurali ty of stations united by a line circuit, selective signal receiving de vices at each station associated with said circuit, signal sending relays also associated with said circuit, means at each station for controlling the signal sending opera tion, and means to render the control of said first aforesaid means eilect-ive whether said first means is connected with one line wire of said cn-cuit or the other, said last atoreline circuit, step-by-step signal receiving devices at ca h station associated with said circuit, signal sending relays also associated .with said circuit, means at each station for controlling the signalsending operation, and means to render the control ofsaid first aforesaid means efi'ective Whethersaid first means is connected with one line wire ofsaid circuit or the other.

12. A system of the character described having a plurality of stations united by a line circuit, selective signal receiving devices at each station associated with said circuit, signal sending apparatus also associated with said circuit, means at each sta t-ion for controlling the signal sending operation, and means to render efiective the control of said first aforesaid means whether said first aforesaid means is; connected with one line wire of said circuit'or the other.

In witness whereof, l hereunto subscribe my name this 21st day of November, A. l). 1910.

nave. anon. 

